Complete genome-based approach and substrate change analysis on Lactobacillus fermentum L1 producing high-yield conjugated linoleic acid

Ji J. J., . and Qian B. P., . and Yang Z. B., . and Huang A. X., . and Ma Q. W., . Complete genome-based approach and substrate change analysis on Lactobacillus fermentum L1 producing high-yield conjugated linoleic acid. pp. 666-674. ISSN 2231-7546

A total of 300 strains of lactic acid bacteria (LAB) were screened for conjugated linoleic acid (CLA) production. The major isomers of CLA in the fermentation broth of the strain with the highest CLA production were analysed by gas chromatography; and whole-genome sequencing analysis was performed to explore the reasons for CLA production. A total of 65 strains of CLA-producing bacteria belonging to four species of LAB were found. The Lactobacillus fermentum L1 with the highest CLA production (1002.486 10- mg/mL) was isolated from the fermented dough. The gene number of L. fermentum L1 was 2034 and the GC content in the gene region was 53.18. Moreover there were high numbers of genes involved in the function of metabolism. In addition there were two major isomers of CLA (C18:2 10t 12c and C18:2 9c 11t) in the fermentation broth of L. fermentum L1. The change in C:18 fatty acids and the linoleic acid metabolism pathway of L. fermentum L1 revealed that C18:2n6c was the substrate of CLA. The present work provides a scientific basis for the application of CLA-producing with LAB.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/27%20(04)%202020/DONE%2...

Abstract

A total of 300 strains of lactic acid bacteria (LAB) were screened for conjugated linoleic acid (CLA) production. The major isomers of CLA in the fermentation broth of the strain with the highest CLA production were analysed by gas chromatography; and whole-genome sequencing analysis was performed to explore the reasons for CLA production. A total of 65 strains of CLA-producing bacteria belonging to four species of LAB were found. The Lactobacillus fermentum L1 with the highest CLA production (1002.486 10- mg/mL) was isolated from the fermented dough. The gene number of L. fermentum L1 was 2034 and the GC content in the gene region was 53.18. Moreover there were high numbers of genes involved in the function of metabolism. In addition there were two major isomers of CLA (C18:2 10t 12c and C18:2 9c 11t) in the fermentation broth of L. fermentum L1. The change in C:18 fatty acids and the linoleic acid metabolism pathway of L. fermentum L1 revealed that C18:2n6c was the substrate of CLA. The present work provides a scientific basis for the application of CLA-producing with LAB.

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Item Type:	Article
AGROVOC Term:	Lactobacillus fermentum
AGROVOC Term:	Bacteria
AGROVOC Term:	Genomes
AGROVOC Term:	Linoleic acid
AGROVOC Term:	Lactic acid bacteria
AGROVOC Term:	Fermentation
AGROVOC Term:	Genes
AGROVOC Term:	Gas chromatography
AGROVOC Term:	Molecular genetics
AGROVOC Term:	Nucleotide sequence
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9236

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